Under Armour O - Series Seamless Tank - Women's Fitted: Sits close to the skin for a streamlined fit without the squeeze of compression. Ultra-soft, ultra-stretchy fabric delivers maximum comfort in and out of the studio. Lightweight, 4-Way Stretch fabrication improves range of motion and dries faster. Superior Moisture Transport System wicks away sweat to keep you drier, longer. Nylon/Elastane. Imported.